I tried LogMeIn some time ago and experienced the same problem. It seems that Poco/Barca is quite sensitive to the kind of graphic adaptor(s) are in a computer and LMI emulates a graphic card if I am not mistaken.

Sometimes nVidia cards cause this problem with Pocomail, solution being to update drivers, or set an exception in the graphics card manager application (nView) for Pocomail.
Not sure whether something like that would be possible with LogMeIn ?

Try PC File Transfer, it has the account connection feature that allows the program working behind routers and firewalls. I was thinking to get Pocomail, but if it blocks some files it would be a problem. With PC File transfer I don't have this problem.